package org.jash.day2

/**
 * Created by Jash
 */
fun main() {
    val l = mutableListOf("一", "二", "三")
    println(l[0])
    val s = "五"
    val str = "一二三四"
    println(s in str)
    l += "四"
    for (c in l) {
        println(c)
    }
}